Masahiro TSUBONO / President
Masahiro TSUBONO / President

At Mitsubishi Heavy Industries Group, we channel big thinking into solutions that move the world forward - advancing the lives of everyone who shares our planet.

Cooling and heating technology is the key for the thermal solution respecting environment. MACO under its mission, in the thermal technology, we aspire to create game-changing products and to pioneer new technologies, and consistently challenge new technological innovations toward the future.

Contact Us

Mitsubishi Heavy Industries - Mahajak Air Conditioners Co., Ltd.

220 Soi Chalongkrung 31 Lamplatiew, Lad Krabang, Bangkok 10520 Thailand



In its initial stage of production, MACO's main customer was Japan. Today, MACO has greatly expanded its markets to support the strong demand of customers both domestically and overseas. MACO's products successfully satisfy the needs of customers who require quality and eco-friendly products. Air-conditioners products of MACO can be seen over the world, in markets as diverse as Japan, Europe, South Africa, Asia, Australia, ect.


  • 1988
    On June 14, 1988, MHI-MACO License and Technical Assistance Agreement Signing Ceremony.
  • 1988
    "Groundbreaking Ceremony" on October 20, 1988.
  • 1989
    Mitsubishi Heavy Industries -MahajakAir Conditioners Co., Ltd. Photo in 1989.
  • 1989
    On December 8,1989, First MitshubishiHeavy Industries Air -Conditioner was manufactured in Thailand.

MACO - Leading Manufacturer of Air Conditioners

Mitsubishi Heavy Industries - Mahajak Air Conditioners Co., Ltd. or MACO is one of leaders in Thailand's airconditioning industry. The company was established on September 22, 1988 in Lad Krabang Industrial Estate and all under a joint venture between Mitsubishi Heavy Industries, Ltd., Japan, a leading, world-class engineering concern, and Mahajak Group, a successful company with multifaceted business interests in Thailand.

Today, MACO manufactures superior quality air-conditioners with a capacity of more than 30 million units since establishment under the "Mitsubishi Heavy Industries" brand. The company has gained the trust and reliance of its customers for its high-quality products, on-time delivery, reasonable price and environment-friendly technologies.

​Mitsubishi Heavy Industries, Ltd.

In 1884, Mitsubishi Heavy Industries, Ltd. or MHI launched its first shipyard business-the Nagasaki Shipyard & MachineryWorks, under founder Mr.Yataro Iwasaki. Over the past century. MHI has placed great emphasis on research and development to create advanced and innovative technologies,
propelling MHI to be an internationally recognized leader in the engineering sector.